All sales are final. The manufacturer will not accept return of unused material under any circumstances. Purchaser is responsible for calculating their own material requirements and color ratios based on their individual requirement. Any guidance offered by the manufacturer regarding material requirements is based on its own historical installation experience only. Because the manufacturer has no control over installation size estimation, proper substrate preparation or method of application, no guarantee as to results is offered, expressed or implied. It is the purchaser’s sole responsibility to ensure they are ordering the correct quantities of any material.